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Finding the Fourth Proportional to 76,005.78, 104,887.81 and 42,471.78

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Solution

The fourth proportional to 76,005.78, 104,887.81 and 42,471.78 is: 58,610.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,005.78 : 104,887.81 = 42,471.78 : x
  2. Step 2: Convert to fraction form
    76,005.78/104,887.81 = 42,471.78/x
  3. Step 3: Cross multiply
    76,005.78x = 104,887.81 × 42,471.78
  4. Step 4: Simplify right side
    76,005.78x = 4,454,771,991.00
  5. Step 5: Solve for x
    x = 4,454,771,991.00/76,005.78
  6. Step 6: Final answer
    x = 58,610.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.